Evaporator



F. W. KREUTTER EVAPORATOR.

APPLICATION FILED JAN-16,1919.

1 ,358, 1 65 Patented Nov. 9, 1920.

2 SHEETS-SHEET I.

PATENT OFFICE.

FREDERICK W. KREUTTER, OF ATTICA, NEW YORK.

EVAPORATOR.

Application filed January 16, 1919.

To (5Z6 whom it may concern Be it lrnownthat I, FREDERICK W. KREUT- run, a citizen of the United States, residing at Attica, in the county of vVyoming and State of New York, have invented new and useful Improvements in Evaporators, of which the following is a specification.

This invention relates to an evaporator for heating a liquid solution, such as maple syrup, for the purpose of concentrating or thickening the same.

The object of the invention is to provide an evaporator of improved form which will evaporate a maximum amount of solution for the quantity of heat consumed, which is simple and inexpensive in construction and capable of being easily assembled for use or dismembered for repairs, transportation or storage.

This application is a continuation in part of an application for patent filed by myself October 20, 1916, Serial No. 116,874.

In the accompanying drawings: Figure 1 is a top plan view of an evaporator embodying my improvements. Fig. 2 is a longitudinal section of the same. Figs. 3 and i are vertical transverse sections taken on the correspondingly numbered lines in Fig. 1.

Similar characters of reference indicate corresponding parts throughout the several views.

The oven or furnace which forms part of the evaporator for generating the heat may be of any suitable construction but as shown in the drawings, the same preferably comprises a fire place 1 at the front end of the furnace, an ash pit 2 arranged below the fire place, a combustion chamber 3 extending rearwardly from the fire place, and a smoke pipe or chimney l extending upwardly from the rear end of the combustion chamber. 5, 6, represent two preheating pan sections arranged lengthwise on opposite sides of the front part of the fire place and the adjacent front part of the combustion chamber, so that the lower parts of these pan sections are exposed to the heat of this furnace and the liquid contents of these pan sections receives a primary heating thereby. These preheating pan sections are preferably supported by providing the inner upper corners of the side walls of the furnace and combustion chamber with rabbets which receive the lower parts of the preheating pan sections while the upper parts of the latter are ex Specification of Letters Patent.

Patented Nov. 9, 1920.

Serial No. 271,487.

posed. The fresh, thin solution is supplied by a feed pipe 7 into the rear end of one preheating pan section where, if desired, the level of the solution may be maintained at a fixed height by any suitable float feed control such as is common to the art. At the upper parts of the front ends of the preheating pan sections the same are connected by a transverse pipe 8 which is arranged above the furnace and whereby the liquid is transferred from the front end of the left handpan section 5 to the front end of the right hand pan section 6.

The solution'flows from the rear end of the right hand preheating pan section 6 by means of a transfer or pivot pipe 9 into the corresponding side of the rear end of a main or intermediate evaporating pan or pan section 10 arranged lengthwise over the front part of the heating space of the furnace and the adjacent part of the combustion chamher. The main evaporating pan 10 is provided with a bottom 11 and two sets of lon gitudinal corrugations alternately disposed, the one set 12 extending upwardly from the bottom and the other set 13 extending downwardly from the bottom, thereby exposing a very large area of the pan to the hot gases. Most of the upwardly extending corrugations 12 are provided with upwardly extending longitudinal baffles or deflecting fins 14 which cause the liquid to pursue a zig zag course in this pan as indicated by the arrows, so as to obtain: rapid evaporation and auniform product. The liquld is caused to take this course by providing each of these fins at one end with an opening 140, the several openings of the fins being arranged alternately adjacent to opposite ends of the main pan, as shown in Fig. 2. The

liquid which has by this time become quite viscous now passes out through a transfer or pivot pipe 16 into a final heating pan or finishing pan section 15 which is arranged over the rear part of the combustion chamber. The pipe 16 connects the opposite side of the rear end of the main pan with the corresponding side of the front end of the finishing pan.

Those parts of the transfer pivot pipes 9 and 16 which open into opposite sides of the main evaporating pan 10 are arranged horizontally and transversely in line so that this main pan section may turn about these pipes as an axis for raising and lowering the front I an outlet 28 which is normally closed by a plug or stopper 21 which permits the liquid to be withdrawn when the same has reached a predetermined consistency or the stopper may be left off when a continuous discharge is desired. The final heating span is provided with transverse cor ugations 9-2 projecting upwardly from its bottom :23 and with deflecting fins or baflies 2d extending .transjversely of the same for the purpose at compelling the liquid to take a long zig-zag course in its passage through the final pan and thereby increasing the evaporating effect accordingly. The liquid is compelled to take this course by providing the several fins 2st alternately adjacent to opposite longitudinal sides of the final heating pan with openings 240, as shown in Fig. 4.

t will be noted that the rear wall 25 of themainpan is inclined upwardly and forwardly This permits of the forwardend of said main evaporating pan being lifted up so that if the liquid level drops too low, the pan may be tilted and the level of the fluid thus increased to avoid scorching-of the solid contents of the liquid. This lifting of the main pan may be effected in any suitable manner either manually, mechanically or automatically.

This evaporator will rapidly evaporate large quantities of syrup with a minimum amount of heat and therefore permit of evaporating liquids such as maple sap for producing maple syrup or sugar at a correspondingly reduced cost.

I claim as my invention:

1. An evaporator comprising a furnace, a combustion chamber arranged in rear of the furnace, a front pan section arranged over said furnace and combustion chamber and ha ring a forward y'inclined rear wall, a rear pan section arranged over said furnace, and a conduit pivotally connecting the rear end of said front pan section with the front end of said rear pan section.

2. An evaporator comprising a furnace, a combustion chamber arranged in rear of the furnace, a front pan section arranged over said furnace and combustion chamber and having a forwardly inclined rear wall, a rear pan section arranged over the combustion chamber, a side pan section arranged lengthwise at the side of said front pan section and the furnace and combustion chamber aconduit aivotall connectin one side of the rear end of said front pan with the rear end of said side pan, and a conduit pivotally connecting theopposite side of the rear end of the front pan with the corre sponding side of the front end of said rear nan.

FREDERICK W. KREUTTEB. 

